{"id":1636,"date":"2026-09-08T08:07:49","date_gmt":"2026-09-08T08:07:49","guid":{"rendered":"https:\/\/maroczain.com\/scolaire.maroczain.com\/?page_id=1636"},"modified":"2026-09-08T08:07:49","modified_gmt":"2026-09-08T08:07:49","slug":"cnc-chimie-mza-prepa-excellence","status":"publish","type":"page","link":"https:\/\/maroczain.com\/scolaire.maroczain.com\/cnc-chimie-mza-prepa-excellence\/","title":{"rendered":"CNC Chimie \u2014 MZA Pr\u00e9pa Excellence."},"content":{"rendered":"\n&#8220;`html\n<div id=\"mza-cnc-chimie\">\n\n<style>\n#mza-cnc-chimie,#mza-cnc-chimie *{box-sizing:border-box}\n#mza-cnc-chimie{\n --navy:#06172c;--blue:#0d416d;--gold:#c99a36;--gold2:#efd68c;\n --paper:#f5f6f8;--text:#18283a;--muted:#687789;--line:#dfe5eb;\n font-family:Arial,Helvetica,sans-serif;background:var(--paper);color:var(--text)\n}\n#mza-cnc-chimie a{text-decoration:none;color:inherit}\n#mza-cnc-chimie .wrap{max-width:1200px;margin:auto;padding:0 24px}\n#mza-cnc-chimie section{padding:68px 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.exercise p,#mza-cnc-chimie .exercise li{color:var(--muted);line-height:1.7}\n#mza-cnc-chimie .hint{\n display:none;margin-top:13px;padding:15px;border-radius:12px;\n background:#eef3f7;color:#425469;line-height:1.65\n}\n#mza-cnc-chimie .timer{\n background:#fff;border:1px solid var(--line);border-radius:22px;\n padding:28px;text-align:center\n}\n#mza-cnc-chimie .timerDisplay{\n font:600 52px\/1 Georgia,serif;color:var(--navy);margin:20px 0\n}\n#mza-cnc-chimie .qcm{\n background:#fff;border:1px solid var(--line);border-radius:23px;padding:28px\n}\n#mza-cnc-chimie .question{\n padding:20px;margin:15px 0;background:#f7f8fa;border-radius:14px\n}\n#mza-cnc-chimie .question strong{display:block;color:var(--navy);margin-bottom:12px}\n#mza-cnc-chimie label{display:block;padding:8px 0;color:#526174;cursor:pointer}\n#mza-cnc-chimie #cncChimieResult{\n display:none;margin-top:18px;padding:20px;border-radius:14px;\n background:var(--navy);color:#fff\n}\n#mza-cnc-chimie .cta{\n text-align:center;padding:50px 24px;border-radius:25px;\n background:linear-gradient(135deg,#06172c,#0d416d);color:#fff\n}\n#mza-cnc-chimie .cta h2{color:#fff}\n#mza-cnc-chimie .cta p{\n max-width:780px;margin:0 auto 22px;color:#cfdae4;line-height:1.7\n}\n\n@media(max-width:900px){\n #mza-cnc-chimie .grid,#mza-cnc-chimie .grid3,\n #mza-cnc-chimie .process{grid-template-columns:1fr}\n}\n<\/style>\n\n<header class=\"hero\">\n<div class=\"wrap\">\n\n<span class=\"badge\">MZA PR\u00c9PA EXCELLENCE \u2022 CNC CHIMIE<\/span>\n\n<h1>Chimie<br>CNC<\/h1>\n\n<p class=\"lead\">\nUne pr\u00e9paration concours centr\u00e9e sur les \u00e9quilibres, les bilans, les r\u00e9actions,\nla thermochimie, la cin\u00e9tique, les acides-bases, l\u2019oxydor\u00e9duction,\nl\u2019\u00e9lectrochimie et la strat\u00e9gie de r\u00e9solution rapide.\n<\/p>\n\n<div class=\"actions\">\n<a href=\"#programme\" class=\"btn gold\">\ud83d\udcda PROGRAMME<\/a>\n<a href=\"#problems\" class=\"btn glass\">\ud83e\udde9 PROBLEM LAB<\/a>\n<a href=\"#speed\" class=\"btn glass\">\u23f1 SPEED LAB<\/a>\n<a href=\"#blanc\" class=\"btn glass\">\ud83c\udfc6 CONCOURS BLANC<\/a>\n<a href=\"#diagnostic\" class=\"btn glass\">\u2753 DIAGNOSTIC<\/a>\n<\/div>\n\n<\/div>\n<\/header>\n\n<section id=\"programme\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">CNC CHIMIE MASTER MAP<\/span>\n<h2>Les grands blocs \u00e0 ma\u00eetriser.<\/h2>\n<\/div>\n\n<div class=\"grid3\">\n\n<div class=\"card\">\n<h3>01 \u2022 Structure de la mati\u00e8re<\/h3>\n<p>Atome, configurations \u00e9lectroniques, p\u00e9riodicit\u00e9 et liaisons.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>02 \u2022 Thermochimie<\/h3>\n<p>Enthalpie, Hess, enthalpies standard et bilans \u00e9nerg\u00e9tiques.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>03 \u2022 \u00c9quilibres<\/h3>\n<p>Quotient r\u00e9actionnel, constante d\u2019\u00e9quilibre et \u00e9volution spontan\u00e9e.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>04 \u2022 Acide-base<\/h3>\n<p>pH, pKa, buffers, dosages et esp\u00e8ces pr\u00e9dominantes.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>05 \u2022 Pr\u00e9cipitation<\/h3>\n<p>Produit de solubilit\u00e9, saturation et domaines de pr\u00e9cipitation.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>06 \u2022 Oxydor\u00e9duction<\/h3>\n<p>Couples redox, potentiels, bilans \u00e9lectroniques et sens d\u2019\u00e9volution.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>07 \u2022 \u00c9lectrochimie<\/h3>\n<p>Piles, \u00e9lectrolyse, Nernst, \u00e9nergie et rendement faradique.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>08 \u2022 Cin\u00e9tique<\/h3>\n<p>Ordre de r\u00e9action, lois int\u00e9gr\u00e9es, temps de demi-r\u00e9action et Arrhenius.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>09 \u2022 Strat\u00e9gie CNC<\/h3>\n<p>Tableaux d\u2019avancement, hypoth\u00e8ses, contr\u00f4le et r\u00e9daction.<\/p>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section class=\"dark\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\" style=\"color:#efd68c\">MZA CNC CHEM ENGINE<\/span>\n<h2>Six r\u00e9flexes pour tout probl\u00e8me de chimie.<\/h2>\n<\/div>\n\n<div class=\"process\">\n<div><b>01<\/b><span>SYST\u00c8ME<\/span><\/div>\n<div><b>02<\/b><span>R\u00c9ACTION<\/span><\/div>\n<div><b>03<\/b><span>BILAN<\/span><\/div>\n<div><b>04<\/b><span>\u00c9QUILIBRE<\/span><\/div>\n<div><b>05<\/b><span>CALCUL<\/span><\/div>\n<div><b>06<\/b><span>CONTR\u00d4LE<\/span><\/div>\n<\/div>\n\n<\/div>\n<\/section>\n\n<section>\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">STRAT\u00c9GIE CHIMIE<\/span>\n<h2>\u00c9crire la r\u00e9action juste avant de calculer.<\/h2>\n<\/div>\n\n<div class=\"grid\">\n\n<div class=\"card\">\n<h3>\u00c9quation chimique<\/h3>\n<p>\u00c9quilibrer mati\u00e8re et charge avant tout tableau d\u2019avancement.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Identifier le r\u00e9gime<\/h3>\n<p>R\u00e9action totale, limit\u00e9e, \u00e9quilibre ou approximation dominante.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Choisir la grandeur<\/h3>\n<p>Avancement, pH, potentiel, concentration ou vitesse selon la question.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Contr\u00f4ler<\/h3>\n<p>Concentrations positives, pH plausible, unit\u00e9s et coh\u00e9rence physique.<\/p>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section id=\"problems\" style=\"background:#efede7\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">PROBLEM LAB<\/span>\n<h2>Probl\u00e8mes type CNC Chimie.<\/h2>\n<\/div>\n\n<div class=\"exercise\">\n<span class=\"level\">ACIDE-BASE<\/span>\n<h3>Mission 1 \u2014 Solution tampon<\/h3>\n\n<p>\nOn pr\u00e9pare un m\u00e9lange contenant un acide faible HA et sa base conjugu\u00e9e A\u207b.\n<\/p>\n\n<ol>\n<li>\u00e9crire l\u2019\u00e9quilibre acido-basique ;<\/li>\n<li>exprimer Ka ;<\/li>\n<li>relier pH, pKa et concentrations ;<\/li>\n<li>\u00e9tudier l\u2019effet d\u2019un ajout mod\u00e9r\u00e9 d\u2019acide fort ;<\/li>\n<li>\u00e9tudier l\u2019effet d\u2019un ajout mod\u00e9r\u00e9 de base forte ;<\/li>\n<li>interpr\u00e9ter le pouvoir tampon.<\/li>\n<\/ol>\n\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaCncChimieHint('ch1')\">\ud83d\udca1 INDICE<\/button>\n<div id=\"ch1\" class=\"hint\">\nCommencez par identifier le couple HA\/A\u207b et utilisez le rapport des concentrations des deux formes.\n<\/div>\n<\/div>\n\n<div class=\"exercise\">\n<span class=\"level\">\u00c9LECTROCHIMIE<\/span>\n<h3>Mission 2 \u2014 Pile \u00e9lectrochimique<\/h3>\n\n<p>\nDeux couples redox sont mis en pr\u00e9sence dans deux demi-piles reli\u00e9es par un circuit ext\u00e9rieur.\n<\/p>\n\n<ol>\n<li>identifier anode et cathode ;<\/li>\n<li>\u00e9crire les demi-\u00e9quations ;<\/li>\n<li>\u00e9crire la r\u00e9action globale ;<\/li>\n<li>calculer la force \u00e9lectromotrice ;<\/li>\n<li>utiliser Nernst si les conditions ne sont pas standard ;<\/li>\n<li>discuter le sens spontan\u00e9 de fonctionnement.<\/li>\n<\/ol>\n\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaCncChimieHint('ch2')\">\ud83d\udca1 INDICE<\/button>\n<div id=\"ch2\" class=\"hint\">\nComparez d&#8217;abord les potentiels des deux couples dans les conditions consid\u00e9r\u00e9es.\n<\/div>\n<\/div>\n\n<div class=\"exercise\">\n<span class=\"level\">CIN\u00c9TIQUE<\/span>\n<h3>Mission 3 \u2014 D\u00e9terminer un ordre de r\u00e9action<\/h3>\n\n<p>\nOn suit exp\u00e9rimentalement l\u2019\u00e9volution de la concentration d\u2019un r\u00e9actif A au cours du temps.\n<\/p>\n\n<ol>\n<li>tester un mod\u00e8le d\u2019ordre 0 ;<\/li>\n<li>tester un mod\u00e8le d\u2019ordre 1 ;<\/li>\n<li>tester un mod\u00e8le d\u2019ordre 2 ;<\/li>\n<li>identifier la lin\u00e9arisation pertinente ;<\/li>\n<li>d\u00e9terminer k ;<\/li>\n<li>en d\u00e9duire un temps de demi-r\u00e9action.<\/li>\n<\/ol>\n\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaCncChimieHint('ch3')\">\ud83d\udca1 INDICE<\/button>\n<div id=\"ch3\" class=\"hint\">\nCherchez quelle transformation de la concentration donne une droite en fonction du temps.\n<\/div>\n<\/div>\n\n<\/div>\n<\/section>\n\n<section id=\"speed\" class=\"dark\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\" style=\"color:#efd68c\">SPEED LAB<\/span>\n<h2>10 minutes \u2014 6 r\u00e9flexes de chimie.<\/h2>\n<\/div>\n\n<div class=\"timer\">\n<div style=\"font-size:11px;font-weight:900;color:#987023\">TEMPS RESTANT<\/div>\n<div id=\"cncChimieTimer\" class=\"timerDisplay\">10:00<\/div>\n\n<div class=\"actions\" style=\"justify-content:center\">\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaStartCncChimieTimer()\">\u25b6 D\u00c9MARRER<\/button>\n<button type=\"button\" class=\"btn\" style=\"background:#06172c;color:#fff\" onclick=\"mzaResetCncChimieTimer()\">\u21bb RESET<\/button>\n<\/div>\n<\/div>\n\n<div style=\"height:20px\"><\/div>\n\n<div class=\"grid3\">\n\n<div class=\"card\">\n<h3>01<\/h3>\n<p>Q&lt;K : dans quel sens le syst\u00e8me \u00e9volue-t-il spontan\u00e9ment ?<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>02<\/h3>\n<p>pH inf\u00e9rieur au pKa d\u2019un couple HA\/A\u207b : quelle forme domine ?<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>03<\/h3>\n<p>Produit ionique sup\u00e9rieur \u00e0 Ks : quelle cons\u00e9quence ?<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>04<\/h3>\n<p>Potentiel de cathode sup\u00e9rieur \u00e0 celui de l\u2019anode : quel sens d\u2019\u00e9change \u00e9lectronique ?<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>05<\/h3>\n<p>Une constante cin\u00e9tique augmente avec T : quelle loi mobiliser ?<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>06<\/h3>\n<p>Une concentration calcul\u00e9e est n\u00e9gative : quel r\u00e9flexe imm\u00e9diat ?<\/p>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section>\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">FORMULES \u00c0 SAVOIR MOBILISER<\/span>\n<h2>Le minimum utile pour raisonner vite.<\/h2>\n<\/div>\n\n<div class=\"grid\">\n\n<div class=\"card\">\n<h3>\u00c9quilibre<\/h3>\n<div class=\"formula\">Q = produits \/ r\u00e9actifs<\/div>\n<p>Comparer Q \u00e0 K pour pr\u00e9voir le sens d\u2019\u00e9volution.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Acide-base<\/h3>\n<div class=\"formula\">pH = pKa + log([A\u207b]\/[HA])<\/div>\n<p>Expression utile dans le domaine d\u2019application appropri\u00e9.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Nernst<\/h3>\n<div class=\"formula\">E = E\u00b0 &#8211; (RT\/nF) ln Q<\/div>\n<p>Permet de corriger le potentiel hors conditions standard.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Arrhenius<\/h3>\n<div class=\"formula\">k = A exp(-Ea\/RT)<\/div>\n<p>Relie vitesse de r\u00e9action et temp\u00e9rature.<\/p>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section id=\"blanc\" style=\"background:#efede7\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">CONCOURS BLANC 01<\/span>\n<h2>Chimie \u2014 Sujet transversal.<\/h2>\n<\/div>\n\n<div class=\"card\">\n\n<h3>Partie A \u2014 \u00c9quilibres<\/h3>\n<ol>\n<li>\u00c9crire la r\u00e9action \u00e9tudi\u00e9e.<\/li>\n<li>Construire le tableau d\u2019avancement.<\/li>\n<li>\u00c9tablir le quotient r\u00e9actionnel.<\/li>\n<li>Comparer \u00e0 K.<\/li>\n<li>D\u00e9terminer la composition \u00e0 l\u2019\u00e9quilibre.<\/li>\n<\/ol>\n\n<h3>Partie B \u2014 Acide-base<\/h3>\n<ol>\n<li>Identifier les couples.<\/li>\n<li>Calculer un pH initial.<\/li>\n<li>\u00c9tudier un dosage.<\/li>\n<li>Rep\u00e9rer la zone tampon.<\/li>\n<li>Interpr\u00e9ter l\u2019\u00e9quivalence.<\/li>\n<\/ol>\n\n<h3>Partie C \u2014 \u00c9lectrochimie<\/h3>\n<ol>\n<li>Identifier anode et cathode.<\/li>\n<li>\u00c9crire la r\u00e9action globale.<\/li>\n<li>Calculer E.<\/li>\n<li>Appliquer Nernst.<\/li>\n<li>Discuter le sens spontan\u00e9.<\/li>\n<\/ol>\n\n<h3>Partie D \u2014 Cin\u00e9tique<\/h3>\n<ol>\n<li>Exploiter un tableau de mesures.<\/li>\n<li>Identifier l\u2019ordre.<\/li>\n<li>D\u00e9terminer k.<\/li>\n<li>Calculer t1\/2.<\/li>\n<li>\u00c9tudier l\u2019effet de T.<\/li>\n<\/ol>\n\n<div class=\"actions\">\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaCncChimieHint('chb1')\">\ud83c\udfaf STRAT\u00c9GIE<\/button>\n<button type=\"button\" class=\"btn\" style=\"background:#06172c;color:#fff\" onclick=\"mzaCncChimieHint('chb2')\">\ud83e\udde0 PLAN D&#8217;ATTAQUE<\/button>\n<\/div>\n\n<div id=\"chb1\" class=\"hint\">\nRep\u00e9rez d\u2019abord les sous-questions autonomes : \u00e9quation, couples, sens spontan\u00e9, ordre ou unit\u00e9. Ce sont souvent des points rapides.\n<\/div>\n\n<div id=\"chb2\" class=\"hint\">\nPour chaque partie : r\u00e9action \u2192 tableau \u2192 relation fondamentale \u2192 calcul \u2192 contr\u00f4le chimique du r\u00e9sultat.\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section>\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">ERROR DNA<\/span>\n<h2>Les erreurs qui co\u00fbtent cher en Chimie CNC.<\/h2>\n<\/div>\n\n<div class=\"grid\">\n\n<div class=\"card\">\n<h3>R\u00e9action mal \u00e9quilibr\u00e9e<\/h3>\n<p>Tout le probl\u00e8me devient faux d\u00e8s le tableau d\u2019avancement.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Charge oubli\u00e9e<\/h3>\n<p>Fr\u00e9quente en redox et acide-base.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Approximation non v\u00e9rifi\u00e9e<\/h3>\n<p>Une hypoth\u00e8se de r\u00e9action quasi totale doit \u00eatre contr\u00f4l\u00e9e.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Logarithme mal manipul\u00e9<\/h3>\n<p>Tr\u00e8s fr\u00e9quent dans pH, Nernst et cin\u00e9tique.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Concentration impossible<\/h3>\n<p>N\u00e9gative ou sup\u00e9rieure \u00e0 une quantit\u00e9 initialement disponible.<\/p>\n<\/div>\n\n<div class=\"card\">\n<h3>Sens redox invers\u00e9<\/h3>\n<p>Confusion entre oxydation, r\u00e9duction, anode et cathode.<\/p>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<section class=\"dark\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\" style=\"color:#efd68c\">MZA CHEM CHECK<\/span>\n<h2>Avant de valider une r\u00e9ponse.<\/h2>\n<\/div>\n\n<div class=\"process\">\n<div><b>A<\/b><span>R\u00c9ACTION<\/span><\/div>\n<div><b>B<\/b><span>CHARGE<\/span><\/div>\n<div><b>C<\/b><span>AVANCEMENT<\/span><\/div>\n<div><b>D<\/b><span>UNIT\u00c9<\/span><\/div>\n<div><b>E<\/b><span>DOMAINE<\/span><\/div>\n<div><b>F<\/b><span>SENS<\/span><\/div>\n<\/div>\n\n<\/div>\n<\/section>\n\n<section id=\"diagnostic\">\n<div class=\"wrap\">\n\n<div class=\"head\">\n<span class=\"kicker\">DIAGNOSTIC CNC CHIMIE<\/span>\n<h2>Testez vos r\u00e9flexes concours.<\/h2>\n<p>Le score s\u2019affiche sans r\u00e9v\u00e9ler les r\u00e9ponses correctes.<\/p>\n<\/div>\n\n<div class=\"qcm\">\n<form id=\"cncChimieQuiz\">\n\n<div class=\"question\">\n<strong>1. Si Q&lt;K pour une r\u00e9action \u00e9crite dans le sens direct :<\/strong>\n<label><input type=\"radio\" name=\"cc1\" value=\"1\"> le syst\u00e8me \u00e9volue spontan\u00e9ment dans le sens direct<\/label>\n<label><input type=\"radio\" name=\"cc1\" value=\"0\"> il \u00e9volue toujours dans le sens inverse<\/label>\n<label><input type=\"radio\" name=\"cc1\" value=\"0\"> il est n\u00e9cessairement \u00e0 l\u2019\u00e9quilibre<\/label>\n<label><input type=\"radio\" name=\"cc1\" value=\"0\"> aucune \u00e9volution n\u2019est possible<\/label>\n<\/div>\n\n<div class=\"question\">\n<strong>2. Pour un couple HA\/A\u207b, si pH&lt;pKa :<\/strong>\n<label><input type=\"radio\" name=\"cc2\" value=\"1\"> la forme acide HA est favoris\u00e9e<\/label>\n<label><input type=\"radio\" name=\"cc2\" value=\"0\"> A\u207b domine toujours<\/label>\n<label><input type=\"radio\" name=\"cc2\" value=\"0\"> les deux formes sont toujours \u00e9gales<\/label>\n<label><input type=\"radio\" name=\"cc2\" value=\"0\"> aucune forme n\u2019existe<\/label>\n<\/div>\n\n<div class=\"question\">\n<strong>3. Si le produit ionique d\u00e9passe le produit de solubilit\u00e9 :<\/strong>\n<label><input type=\"radio\" name=\"cc3\" value=\"1\"> une pr\u00e9cipitation est thermodynamiquement favoris\u00e9e<\/label>\n<label><input type=\"radio\" name=\"cc3\" value=\"0\"> la solution devient automatiquement plus dilu\u00e9e<\/label>\n<label><input type=\"radio\" name=\"cc3\" value=\"0\"> aucun solide ne peut se former<\/label>\n<label><input type=\"radio\" name=\"cc3\" value=\"0\"> le pH devient n\u00e9cessairement \u00e9gal \u00e0 7<\/label>\n<\/div>\n\n<div class=\"question\">\n<strong>4. Dans une pile en fonctionnement spontan\u00e9 :<\/strong>\n<label><input type=\"radio\" name=\"cc4\" value=\"1\"> l\u2019oxydation a lieu \u00e0 l\u2019anode<\/label>\n<label><input type=\"radio\" name=\"cc4\" value=\"0\"> la r\u00e9duction a lieu \u00e0 l\u2019anode<\/label>\n<label><input type=\"radio\" name=\"cc4\" value=\"0\"> les \u00e9lectrons circulent dans l\u2019\u00e9lectrolyte uniquement<\/label>\n<label><input type=\"radio\" name=\"cc4\" value=\"0\"> les deux \u00e9lectrodes ont toujours le m\u00eame potentiel<\/label>\n<\/div>\n\n<div class=\"question\">\n<strong>5. La loi d\u2019Arrhenius relie principalement :<\/strong>\n<label><input type=\"radio\" name=\"cc5\" value=\"1\"> constante cin\u00e9tique et temp\u00e9rature<\/label>\n<label><input type=\"radio\" name=\"cc5\" value=\"0\"> pH et volume<\/label>\n<label><input type=\"radio\" name=\"cc5\" value=\"0\"> pression et potentiel redox<\/label>\n<label><input type=\"radio\" name=\"cc5\" value=\"0\"> solubilit\u00e9 et masse molaire uniquement<\/label>\n<\/div>\n\n<div class=\"question\">\n<strong>6. Une concentration calcul\u00e9e n\u00e9gative signifie :<\/strong>\n<label><input type=\"radio\" name=\"cc6\" value=\"1\"> qu\u2019il faut v\u00e9rifier le mod\u00e8le, l\u2019avancement ou les hypoth\u00e8ses<\/label>\n<label><input type=\"radio\" name=\"cc6\" value=\"0\"> qu\u2019elle est physiquement acceptable<\/label>\n<label><input type=\"radio\" name=\"cc6\" value=\"0\"> qu\u2019il suffit de prendre sa valeur absolue<\/label>\n<label><input type=\"radio\" name=\"cc6\" value=\"0\"> qu\u2019elle doit \u00eatre multipli\u00e9e par -1 sans justification<\/label>\n<\/div>\n\n<button type=\"button\" class=\"btn gold\" onclick=\"mzaCncChimieScore()\">\nVALIDER MON DIAGNOSTIC\n<\/button>\n\n<\/form>\n\n<div id=\"cncChimieResult\"><\/div>\n<\/div>\n\n<\/div>\n<\/section>\n\n<section>\n<div class=\"wrap\">\n\n<div class=\"cta\">\n\n<h2>CNC Chimie \u2014 Mode Concours<\/h2>\n\n<p>\nLa chimie concours se gagne par une discipline stricte :\n\u00e9quation correcte, bilan coh\u00e9rent, relation fondamentale bien choisie,\nhypoth\u00e8ses contr\u00f4l\u00e9es et interpr\u00e9tation chimique du r\u00e9sultat.\n<\/p>\n\n<div class=\"actions\" style=\"justify-content:center\">\n<a href=\"#problems\" class=\"btn gold\">\ud83e\udde9 PROBLEM LAB<\/a>\n<a href=\"#speed\" class=\"btn glass\">\u23f1 SPEED LAB<\/a>\n<a href=\"#blanc\" class=\"btn glass\">\ud83c\udfc6 CONCOURS BLANC<\/a>\n<\/div>\n\n<\/div>\n<\/div>\n<\/section>\n\n<script>\nfunction mzaCncChimieHint(id){\n const el=document.getElementById(id);\n if(!el)return;\n el.style.display=el.style.display===\"block\" ? \"none\" : \"block\";\n}\n\nlet cncChimieSeconds=600;\nlet cncChimieInterval=null;\n\nfunction mzaRenderCncChimieTimer(){\n const el=document.getElementById(\"cncChimieTimer\");\n if(!el)return;\n const m=Math.floor(cncChimieSeconds\/60);\n const s=cncChimieSeconds%60;\n el.textContent=String(m).padStart(2,\"0\")+\":\"+String(s).padStart(2,\"0\");\n}\n\nfunction mzaStartCncChimieTimer(){\n if(cncChimieInterval)return;\n cncChimieInterval=setInterval(function(){\n   if(cncChimieSeconds>0){\n     cncChimieSeconds--;\n     mzaRenderCncChimieTimer();\n   }else{\n     clearInterval(cncChimieInterval);\n     cncChimieInterval=null;\n     const el=document.getElementById(\"cncChimieTimer\");\n     if(el)el.textContent=\"TERMIN\u00c9\";\n   }\n },1000);\n}\n\nfunction mzaResetCncChimieTimer(){\n clearInterval(cncChimieInterval);\n cncChimieInterval=null;\n cncChimieSeconds=600;\n mzaRenderCncChimieTimer();\n}\n\nfunction mzaCncChimieScore(){\n const form=document.getElementById(\"cncChimieQuiz\");\n const result=document.getElementById(\"cncChimieResult\");\n\n let score=0;\n let complete=true;\n\n [\"cc1\",\"cc2\",\"cc3\",\"cc4\",\"cc5\",\"cc6\"].forEach(function(name){\n   const answer=form.querySelector('input[name=\"'+name+'\"]:checked');\n   if(!answer){\n     complete=false;\n   }else{\n     score+=Number(answer.value);\n   }\n });\n\n result.style.display=\"block\";\n\n if(!complete){\n   result.innerHTML=\"<strong>R\u00e9pondez aux 6 questions avant de valider.<\/strong>\";\n   return;\n }\n\n const pct=Math.round(score\/6*100);\n\n let level=\"Pr\u00e9paration CNC Chimie \u00e0 renforcer\";\n if(pct>=50)level=\"Fondations concours acquises\";\n if(pct>=67)level=\"Bon niveau CNC Chimie\";\n if(pct>=84)level=\"Tr\u00e8s bon niveau CNC Chimie\";\n if(pct===100)level=\"Excellent profil concours\";\n\n result.innerHTML=\n \"<strong style='font-size:30px;color:#efd68c'>\"+pct+\"%<\/strong>\"+\n \"<p><b>\"+level+\"<\/b><\/p>\"+\n \"<p>Score : \"+score+\" \/ 6<\/p>\"+\n \"<p>Les r\u00e9ponses correctes et la correction d\u00e9taill\u00e9e restent masqu\u00e9es.<\/p>\";\n}\n\nmzaRenderCncChimieTimer();\n<\/script>\n\n<\/div>\n&#8220;`\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`html MZA PR\u00c9PA EXCELLENCE \u2022 CNC CHIMIE ChimieCNC Une pr\u00e9paration concours centr\u00e9e sur les \u00e9quilibres, les bilans, les r\u00e9actions, la thermochimie, la cin\u00e9tique, les acides-bases, l\u2019oxydor\u00e9duction, l\u2019\u00e9lectrochimie et la strat\u00e9gie de r\u00e9solution rapide. \ud83d\udcda PROGRAMME \ud83e\udde9 PROBLEM LAB \u23f1 SPEED LAB \ud83c\udfc6 CONCOURS BLANC \u2753 DIAGNOSTIC CNC CHIMIE MASTER MAP Les grands blocs \u00e0 ma\u00eetriser. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1636","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/pages\/1636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/comments?post=1636"}],"version-history":[{"count":1,"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/pages\/1636\/revisions"}],"predecessor-version":[{"id":1638,"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/pages\/1636\/revisions\/1638"}],"wp:attachment":[{"href":"https:\/\/maroczain.com\/scolaire.maroczain.com\/wp-json\/wp\/v2\/media?parent=1636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}